52-771-3 SPI 2-3-4 Block Set
$198.21
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Matched 2-3-4 Block Set Features include... Supplied in Matched Pairs 23 Holes 5 tapped 3/8-16 18 untapped 0.0002" Parallelism Precision Ground and Case Hardened on all 6 sides. Hardened Steel to RC 55-60.
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$198.21
(+$23.82)